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  4. Number of Deuterium exchange in the given tautomer when the compound is kept in N a O D / D2O for a long time is: <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/c-rbf5jl7ziu3n.png />

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Q. Number of Deuterium exchange in the given tautomer when the compound is kept in $N a O D / D_{2}O$ for a long time is:

Question

NTA AbhyasNTA Abhyas 2020Organic Chemistry – Some Basic Principles and Techniques

Solution:

Deuterium exchange takes place with $\text{H}$ present at $\alpha $ -position.
Total $\text{α} - \text{H} \, \text{=} \, \text{2}$